Renovations of the abandoned island in the Venetian Lagoon will add quite a few more euros to that cost, however. It's estimated that he'll have to pour in another £16.25 million to update the dilapidated buildings onsite.

Technically, the island was a real estate agent's nightmare: The island has a horrific past. Having survived foreign invasions for centuries, it became a burial ground for thousands quarantined there because of plagues. In the 1920s, it housed a hospital reportedly led by a mad doctor who performed crude surgery on his patients’ brains. (Though none of that has stopped the Italian government from hoping it'll be turned into a luxury hotel.)